Stop UI jumping when clicking Contextual Search Results in Custom Tab

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.customtabs;
 
 import android.content.Intent;
 import android.net.Uri;
 import android.os.IBinder;
 import android.support.customtabs.CustomTabsIntent;
@@ skipping 218 matching lines @@
      */
     private void loadUrlInCurrentTab(LoadUrlParams params, long timeStamp) {
         Intent intent = getIntent();
         IntentHandler.addReferrerAndHeaders(params, intent, this);
         mTab.loadUrlAndTrackFromTimestamp(params, timeStamp);
     }
 
     @Override
     public boolean createContextualSearchTab(ContentViewCore searchContentViewCore) {
         if (mTab == null) return false;
+        getCurrentContentViewCore().clearSelection();
         NavigationEntry entry =
                 searchContentViewCore.getWebContents().getNavigationController().getPendingEntry();
         String url = entry != null
                 ? entry.getUrl() : searchContentViewCore.getWebContents().getUrl();
         mTab.loadUrl(new LoadUrlParams(url));
         return false;
     }
 
     @Override
     public SingleTabModelSelector getTabModelSelector() {
@@ skipping 107 matching lines @@
 
     /**
      * @return The {@link CustomTabIntentDataProvider} for this {@link CustomTabActivity}. For test
      *         purposes only.
      */
     @VisibleForTesting
     CustomTabIntentDataProvider getIntentDataProvider() {
         return mIntentDataProvider;
     }
 }